The BGS Lexicon of Named Rock Units — Result Details
Ben Griam Conglomerate Member
| Computer Code: | BGCON | Preferred Map Code: | BGC |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Emsian Age (DE) — Emsian Age (DE) | ||
| Lithological Description: | Comprises a red conglomerate that contains clasts mainly of Moine Supergroup metasedimentary rocks and granite, and thin interbeds of sandstone. | ||
| Definition of Lower Boundary: | Unconformable on Moine metasedimentary rocks, which are mainly composed of migmatitic pelite and semipelite of the Loch Coire Formation, together with granitic sheets known as the Badenloch granite sheets, of the Caledonian Igneous Supersuite. | ||
| Definition of Upper Boundary: | Conformably overlain by sandstone of the undifferentiated Ousdale Arkose Formation. | ||
| Thickness: | About 250m | ||
| Geographical Limits: | Mountain tops in the Ben Griam Mor and Ben Griam Beg area, Sutherland, about 28km northwest of Helmsdale. | ||
| Parent Unit: | Ousdale Arkose Formation (OA) | ||
| Previous Name(s): | Ben Griam Lower Arkose [Obsolete Name And Code: Use BGCON]
(BGLA)
Ben Griam Lower Conglomerate [Obsolete Name And Code: Use BGCON] (BGLC) Ben Griam Upper Arkose [Obsolete Name And Code: Use BGCON] (BGUA) Ben Griam Upper Conglomerate [Obsolete Name And Code: Use BGCON] (BGUC) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Mountain tops of Ben Griam Mor and Ben Griam Beg, Sutherland, about 28km northwest of Helmsdale. | ||
| Reference(s): | |||
| British Geological Survey. 2004. Badenloch. Scotland Sheet 109W. Bedrock. 1:50 000 Series. (Keyworth, Nottingham: British Geological Survey.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S109 | |||